Drilling Cross-Over & Sub: A Key Transfer Tool in Oil Drilling

In the complex and technology-intensive engineering field of oil drilling, a variety of specialized equipment works together to ensure that drilling operations run smoothly. As one of the key components, the Cross Over Sub plays an indispensable role in connecting different types or specifications of drilling tools.

• Material selection

Cross-over&Sub is manufactured from 4145H. The connections are protected by a phosphate surface coating that reduces the galling when the initial make-up takes place. Sub is manufactured according to API 7-1 Specification.This material has high yield strength, tensile strength and good toughness to resist wear, corrosion and deformation in harsh drilling environments. At the same time, the selection of materials also needs to consider its compatibility with drilling fluids and other downhole environments to ensure long-term stable performance.

Drilling

cross-over&sub

 

High Strength	The 4145H alloy has excellent tensile and yield strength after heat treatment, providing the robust structural integrity needed in drill string components.
Wear Resistance	The hardened steel has enhanced hardness and abrasion resistance, allowing it to withstand the punishing friction and erosion present during drilling.
Toughness	4145H steel possesses good impact toughness, enabling it to resist cracking when subjected to repeated impact and fatigue loads.
Durability	The hardened high-strength alloy steel construction ensures long component life even in the most extreme downhole conditions involving high temperatures, pressures, and corrosive fluids.
Reliability	Components made from 4145H steel provide consistent and dependable performance thanks to the material's balanced mechanical properties after heat treatment hardening.
Compatibility	4145H has similar performance characteristics to other drill string alloys, enabling compatible connections and transitions.

Vigor Drilling supplies the X-Over Pin (Male) x Box (Female), Pin( Male) x Pin (Male), and Box (Female) x Box(Female) for the Drilling string crossover sub.

Vigor's Crossover Sub (X-Over) is used for crossing over from the size of a single connection to another. Also used for prolonging the connection life of a more expensive drilling component.

Drilling String Crossover Sub are available with:

1. Box x Pin
2. Box x Box or
3. Pin x Pin Connections

• Manufacturing process

In the manufacturing process, advanced processing technology is the key to ensure the quality of Cross Over Sub. Generally, CNC machine tools are used for precise machining to ensure the accuracy of each size. For the thread part, special thread machining tools and processes are needed to ensure the quality of the thread. After the processing is completed, strict dimensional inspection and quality inspection will also be carried out, such as using a coordinate measuring instrument and other equipment for comprehensive testing to ensure that each Cross Over Sub meets the design standards.

In order to improve the corrosion and wear resistance of Cross Over Sub, the surface treatment process is essential. Common surface treatment methods include phosphating treatment, galvanized treatment and so on. These treatments create a protective coating on the surface of the Cross Over Sub, reducing corrosion and wear in the downhole environment and extending its service life.

In the entire production process, strict quality control measures throughout. From the inspection of raw materials, the monitoring of the processing process to the testing of the finished product, each link has a detailed quality standard and testing method. Any product that does not meet the quality requirements to ensure the reliability and safety of Cross Over Sub in oil drilling operations cannot enter the market.

The Vigor tool joint continues to improve and innovate, and through its design concept, exquisite manufacturing process, and rigorous performance, it becomes an excellent tool joint in the field of petroleum exploration. The products have been used by many internationally renowned oil and oilfield service companies, and have received high recognition and good feedback from customers. The company implements I509001 quality management system and API Petroleum Association standards. You can contact us at 0086 029 81161513 or info@vigorpetroleum.com, we will provide you with the most reliable products and services.